For controlling the flow of liquid, we found the 8500 KOFLOC Mass Flow Controller better one option. This controller is packed with many features one of them include "high-lift actuator, which allows this compact model to control a large ﬂow rate". This controller has 14-bit converter, that permits display and operation in 4-1/2 digits. This device is widely in demand due to its display unit and the pattern setting function. Whether it is "Auto zero and Auto close functions" or it is "RS232C/RS485 communication function", this device is always been a first choice of buyers. Apart from that, this 8500 KOFLOC Mass Flow Controller is easily operated by a 24 VDC power supply and also comes with a display and setting unit.